It’s only a matter of weeks before Alexandria Sekella and her baby daddy, Matt McCann, make their debut on MTV’s Teen Mom 3, but these two have been butting heads since their 16 and Pregnant Season 4 days. In an exclusive interview during a 16 and Pregnant After Show, the Teen Mom discusses how she’s stopped believing in her baby daddy Matt McCann.

“He was such a good person, and then all of a sudden … it just did not matter. I stopped believing in Matt about a month ago and I was like alright, this is a lost cause. I’m not going to fight for something you’re not going to make the effort for,” Alexandria gabbed in her After Show interview over a year ago.

The Teen Mom went on to say that it was her fault for expecting Matt to kick his drug habit and be a part of the family she hoped they’d be.

“When I really sat down and took a look at Matt’s addiction and his problems, I had set a goal for him, which was my fault. I was expecting d him to do something he wasn’t willing to do, and that was my downfall for the whole thing,” Alexandria reveals. “And I had realistically planned something that he shouldn’t have been a part of.”

We can watch Alex and Matt’s story unfold on Teen Mom 3 when it premieres Monday, August 26 at 10 p.m. ET on MTV. Will you tune in? Tell us below